u can draw two plots on 1 graph using hold on command.here is the examplet=0:0.01:1f=3w=2*pi*fa=2f1=2w=2*pi*f1a1=-1x=a*sin(w*t)y=a1*sin(w1*t)hold onplot(t,x)plot(t,y,'p')title('Graph')run this command on matlab.., hope thz will help.., thanks